Question

three cars travelled distances in the ratio 1:2:3 .if the ratio of the time is 3:2:1 then the ratio of their speeds is?

options:
(1) 1:3:9
(2)1:4:9
(3)1:2:3
(4)1:5:8​

Answer 1

Three cars travelled distances in the ratio 1:2:3. If the ratio of the time of travel is 3:2:1. then the ratio of their speeds is

We have,

$\frac{1}{3}:\frac{2}{2}:\frac{3}{1} = \frac{1}{3}:1:3$

LCM of(3& 1)=3

$\frac{1}{3} \times 3:1 \times 3:3 \times 3$

$speed = \frac{distance}{time}$

$= 1:3:9$

$bts (◍•ᴗ•◍)❤ exo$

Answer 2

Answer:

Correct Option: A

Step-by-step explanation:

Required ratio = 1/3:2/2:3/1

=  1 /3: 1 : 3

1 /3× 3 : 1 × 3 : 3 × 3

∴  Speed =  Distance /Time

= 1 : 3 : 9